13. For the purposes of sections 10, 12 and 14, the valuation of the benefits of the members and beneficiaries affected by the withdrawal of an employer that is a party to a multi-employer pension plan is, on the earlier of the following dates, considered to be an actuarial valuation:
(1) the date of the first subsequent actuarial valuation of the plan;
(2) the date as at which the valuation of the benefits of the members and beneficiaries affected by another amendment of the plan for the purpose of the withdrawal of an employer is carried out;
(3) the date of the termination of the pension plan.
For the purposes of the same sections, an amount paid by the employer in accordance with section 229 of the Act does not constitute employer contributions paid.